zhulacn

摘要： Prefix 名 Symbol 1000m 10n Short scale Long scale Since deci 分 d 1000−1/3 10−1 Tenth 1795 centi 百分 c 1000−2/3 10−2 Hundredth 1795 milli 毫 m 1000−1 10−3 阅读全文

摘要： Base units can be combined to derive units of measurement for other quantities. In addition to the two dimensionless derived units radian (rad) and st 阅读全文